help mee thanks uu

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help mee thanks uu
help mee thanks uu

help mee thanks uu
6.x=50 y=6cm
7.a=90 b=4cm
8.x=36
9.（1）x=4cm （2）17-3乘以4=5cm
10.内角和=（9 —2）乘以180=1260°
每个内角度数=1260除以9=140°
11.
内角和=（边数----2)乘以180

这么多题都不懂啊！
授人以鱼，不如授之以渔！
这类题大多都是关于角度的!
记着三角形三个角的和是180°
知道两个角就能知道另外一个角了！

html学多了吧？

下面图不清楚怎么做啊

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